欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
真空中沿固体绝缘材料表面的闪络电压通常远低于绝缘材料自身及相同长度真空间隙的击穿电压,长期以来这一现象极大地限制了高压电真空设备的发展进程。鉴于此,将一种具有优良的可加工性能及表面耐电特性的可加工陶瓷引入真空绝缘领域,进而通过离子交换的方式改变可加工陶瓷的表面元素分布,以降低其表面的二次电子发射系数。并采用Cu＋置换可加工陶瓷表面的Na＋,考察了经不同离子交换时间后试品的表面形貌、介电特性及沿面耐电特性。结果发现：Cu＋离子交换Na＋能够提高可加工陶瓷的沿面闪络电压,随离子交换时间延长试品的沿面闪络电压有提高的趋势,并且出现闪络电压最高点,当离子交换时间过长时,闪络电压会有所降低。这为通过表面改性无机材料提高其表面耐电强度提供了一种新的方法。
英文摘要：
Surface flashover phenomena in vacuum,of which the onset flashover voltage is much lower than the breakdown voltage of either the insulator or the vacuum gap with the same length,seriously limits the development of high voltage electro-vacuum devices.We put the machinable ceramics to vacuum insulation system,and changed the surface element distribution of machinable ceramic by surface ion exchange,which could reduce the surface secondary electron emission coefficient.Cu＋ was used to exchange Na＋in the machinable ceramic.The influence of different exchange time on surface feature,dielectric property and surface flashover voltage of machinable ceramic was analyzed.The experimental results indicate that ion exchange can increase the surface flashover voltage of the sample.With increasing of the exchange time,the surface flashover voltage tends to be increased,even reaches its high point.When the ion exchange time is very long,the surface flashover voltage will reduce.Therefore,a new method can be provided to increase inorganic material＇s surface electric withstanding through the surface modification.
同期刊论文项目
同项目期刊论文
Theoretical and simulation research on self-stabilizing secondary electron emission process across s
Cathode-like luminescence from vacuum-dielectric interface induced by self-stabilizing secondary ele
Influence of Surface Carburization of Machinable Ceramics on Its Pulsed Flashover Characteristics in
Influence of Surface Ion Exchange on Pulsed Flashover Characteristics of Machinable Ceramics in Vacu
Research on surface modification of polytetrafluoroethylene coupled with argon dielectric barrier di
位置：